Centrifugal impeller for decreasing chances for hemolysis and thrombus to occur

Abstract

The invention provides a centrifugal impeller for decreasing chances for hemolysis and thrombus to occur; the centrifugal impeller includes a rear cover plate and a plurality of blades arranged on thesurface of the rear cover plate at intervals; an entry mounting angle of the blades is 10-40 degrees, an exit mounting angle of the blades is 25-65 degrees, a wrap angle of the blades is 70-130 degrees, thickness of the blades is 2-15 mm, thickness of front edges of the blades is less than or equal to that of the tail edges of the blades, width of a wheel exit is 2-15 mm, and suction diameter ofa wheel of the centrifugal impeller is 10-25 mm. The wall shear stress of the centrifugal impeller can be kept in a reasonable range, and chances for hemolysis and thrombus to occur are effectively decreased.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a centrifugal impeller for reducing hemolysis and thrombus. Background technique [0002] The incidence of severe heart failure patients is increasing year by year, but the number of heart donors is very small, and they also face the problems of rejection, infection and other secondary diseases, and the artificial heart pump can assist or replace the function of the heart, so the artificial heart pump Become an important way to solve severe heart failure. [0003] The development of artificial heart pumps has mainly gone through three stages. The first generation is a bionic pulsating pump, which has a similar systolic and diastolic process to the heart, but is bulky, has low durability and is unreliable; the second generation is a rotary pump with mechanical bearings. Stable and efficient, but there are problems of blood pollution and bearing wear; the third generation is a magne...

AI Technical Summary

Problems solved by technology

[0003] The development of artificial heart pumps has mainly gone through three stages. The first generation is a bionic pulsating pump, which has a similar systolic and diastolic process to the heart, but is bulky, has low durability and is unreliable; the second generation is a rotary pump with mechanical bearings. Stable and efficient, but there are problems of blood pollution and bearing wear; the third generation is a magnetic levitation pump, which suspends the rotor parts in the pump chamber, and there is no mechanical contact between the rotor parts and the pump casing, thereby avoiding wear and blood contamination And other issues

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